Visual evoked potential (VEP) it is a non-invasive test that measures electrical activity in certain areas of the brain in response to sensory input
Visual Evoked Potential tests help to identify problems along the visual pathway, that are too subtle to be noticed or found during a regular exam.
These problems are usually caused by demyelination, which results in slowed nerve impulses.
Following are the conditions that are diagnosed using the Visual Evoked Potential test
Prior to the test, you may bathe or shower but do not use any hair products.
The patient is asked to sit in front of a TV monitor while few scalp electrodes are taped over
the forehead and the back of the head. The patient is shown a checkerboard pattern and the
electrical activity is measured.
Usually the test takes less than 10 minutes, including preparation time.